Brain states in freely behaving marmosets.
Olga Bukhtiyarova1,2, Sylvain Chauvette2, Josée Seigneur2
1Department of Psychiatry and Neuroscience, School of Medicine, Université Laval, Québec (Québec), Canada.
Sleep
|May 16, 2022
Summary
Common marmosets exhibit sleep-wake patterns and brain activity closely resembling human states. This makes them a valuable animal model for studying human sleep and brain rhythms.
Area of Science:
- Neuroscience
- Sleep Science
- Comparative Medicine
Background:
- Understanding human sleep-wake states is crucial for neurological research.
- Identifying suitable animal models is essential for studying complex brain functions.
Purpose of the Study:
- To evaluate common marmosets as a potential animal model for human sleep and wakefulness research.
- To characterize the electrographic patterns of sleep and wakefulness in marmosets.
Main Methods:
- Utilized wireless neurologger recordings for longitudinal, multichannel local field potential (LFP) and video data in three marmosets.
- Included cortical, hippocampal, and neck muscle recordings.
- Employed self-organizing maps for formal identification of brain states.
Main Results:
- Marmosets displayed diurnal wakefulness with nocturnal sleep, featuring five distinct electrographic states: wakefulness, drowsiness, light/deep NREM, and REM sleep.
- Observed characteristic human-like electrographic patterns, including mu-rhythm, alpha rhythm, NREM sleep features (slow waves, spindles, ripples), and REM sleep activity.
- Noted shorter sleep cycles in marmosets compared to humans, with overall decreasing delta power throughout the night.
Conclusions:
- Marmoset sleep-wake state distribution and electrographic patterns closely mirror human states.
- Marmosets represent a promising animal model for investigating the origins of human electrographic rhythms and brain states.
- Further research can leverage marmosets to gain deeper insights into human sleep physiology and disorders.
